Abstract
PurposeCardiovascular responses of traditional resistance (TS) training have been extensively explored. However, the fatigue mechanisms associated with an intra-set rest configuration (ISR) have not been investigated. This study compares two modalities of set configurations for resistance exercise that equates work to rest ratios and measures the central and peripheral fatigue in combination with cortical, hemodynamic and cardiovascular measures.Methods11 subjects performed two isometric knee extension training sessions using TS and ISR configurations. Voluntary activation (VA), single twitch amplitude, low frequency fatigue (LFF), Mwave, motor evoked potential (MEP), short intracortical inhibition (SICI), intracortical facilitation (ICF) and heart rate variability were evaluated before and after each training session. During each session beat to beat heart rate, blood pressure and rate pressure product (RPP) were also evaluated.ResultsAfter exercise VA decreased significantly for TS but not for ISR (P < 0.001), single twitch amplitude and LFF values were lower for TS than ISR (P < 0.004), and SICI was reduced only for the TS configuration (P = 0.049). During exercise RPP values were significantly higher for the TS than for ISR (P = 0.001). RPP correlated with VA for TS (r = -.85 P < 0.001) suggesting a relationship between central fatigue and cardiovascular stress.ConclusionsWe conclude that ISR induced lower central and peripheral fatigue as well as lower cardiovascular stress in comparison with TS configuration. Our study suggests that set configuration is a key factor in the regulation of the neuromuscular and cardiovascular responses of resistance training.
Highlights
Cardiovascular modulation and its association with resistance exercise have been the focus of extensive research[1]
After exercise Voluntary activation (VA) decreased significantly for Traditional set configuration (TS) but not for intra-set rest configuration (ISR) (P < 0.001), single twitch amplitude and low frequency fatigue (LFF) values were lower for TS than ISR (P < 0.004), and short intracortical inhibition (SICI) was reduced only for the TS configuration (P = 0.049)
During exercise rate pressure product (RPP) values were significantly higher for the TS than for ISR (P = 0.001)
Summary
Cardiovascular modulation and its association with resistance exercise have been the focus of extensive research[1]. The blood pressure (BP) and heart rate (HR) responses to resistance training are thought to be modulated by peripheral and central mechanisms [1,2] The role of these mechanisms may be mediated by the configuration features (i.e. volume, intensity, number of repetitions/set, rests between sets) of the resistance training, this relationship has not been studied extensively. Traditional set configuration (TS) is the most common procedure of resistance training and consists of performing each repetition of a set without rest until failure [3]. This configuration induces fatigue and discomfort [4]. BP and HR rises proportionally with successive repetitions within a set [2], and the rate at which BP increases is related with both the intensity and the length of a set [5]
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
